[方法技巧] PHP给图片加水印的代码分享

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1^# 大中小发表于 2006-12-10 18:48 只看该作者

PHP给图片加水印的代码分享

收集的两个PHP增加图片水印的类，Michael还没进行过充分测试，有什么问题请反馈给我。
另外故人居也使用了一个Michael自己开发的增加图片水印函数，有机会一起整理出来给大家。
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一、PHP给图片增加水印的类
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<?php
Class Gimage{( Y" F3 Y) A1 S/ T2 o7 Z+ A
var $src_image_name = "";    //输入图片的文件名(必须包含路径名)
var $jpeg_quality = 90;       //jpeg图片质量
var $save_image_file = '';    //输出文件名4 r$ t1 J2 [2 U( ?
var $wm_image_name = "";       //水印图片的文件名(必须包含路径名)
var $wm_image_pos = 1;       //水印图片放置的位置
// 0 = middle+ V7 Q- _, T! P+ {0 D7 y
// 1 = top left8 n( ^9 N* a. W, D1 l) G
// 2 = top right+ ?- w) W. t2 B6 q
// 3 = bottom right* ]1 M! }; R5 d* o* ^& a  y
// 4 = bottom left& H2 |; J$ r! s4 \
// 5 = top middle! ?, v2 t3 T1 ?3 z) A
// 6 = middle right
// 7 = bottom middle
// 8 = middle left
//other = 3! B' {) a! w# T5 q* I' S7 n0 p
var $wm_image_transition = 20;  //水印图片与原图片的融合度 (1=100)
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var $wm_text = "";             //水印文字(支持中英文以及带有
的跨行文字)
var $wm_text_size = 20;       //水印文字大小- P& r0 t; s! v6 C% _) K5 ^5 G
var $wm_text_angle = 4;       //水印文字角度,这个值尽量不要更改- G" G6 C1 u" W
var $wm_text_pos = 3;          //水印文字放置位置
var $wm_text_font = "";       //水印文字的字体
var $wm_text_color = "#cccccc"; //水印字体的颜色值
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function create($filename="")* C; M- z6 T- K. m; ~3 {  X
{
      if ($filename) $this->src_image_name = strtolower(trim($filename));
      ! L' U2 `& ~& T7 }+ }) d0 K# O
      $src_image_type = $this->get_type($this->src_image_name);, _- `! j/ i3 b9 d
      $src_image = $this->createImage($src_image_type,$this->src_image_name);1 H7 ?% U0 U5 H8 l& p5 g. o4 G
      if (!$src_image) return;
      $src_image_w=ImageSX($src_image);; J- I' r$ S/ d# L" b7 S
      $src_image_h=ImageSY($src_image);

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      if ($this->wm_image_name){8 z  z. d/ i, t2 S
         $this->wm_image_name = strtolower(trim($this->wm_image_name));
         $wm_image_type = $this->get_type($this->wm_image_name);3 O/ L6 W3 {3 E" Q* ?0 X
         $wm_image = $this->createImage($wm_image_type,$this->wm_image_name);3 |! j) c! W/ C% q+ u. }% U$ x+ L0 F
         $wm_image_w=ImageSX($wm_image);
         $wm_image_h=ImageSY($wm_image);
         $temp_wm_image = $this->getPos($src_image_w,$src_image_h,$this->wm_image_pos,$wm_image);
         $wm_image_x = $temp_wm_image["dest_x"];
         $wm_image_y = $temp_wm_image["dest_y"];6 @' k8 u9 H1 ?( q
         imageCopyMerge($src_image, $wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_w,$wm_image_h,$this->wm_image_transition);
      }

      if ($this->wm_text){' X7 B* C* S4 R) _9 W0 ~
         $this->wm_text = $this->gb2utf8($this->wm_text);+ m4 X; f8 l& C( B" ~' U$ A7 S3 k
         $temp_wm_text = $this->getPos($src_image_w,$src_image_h,$this->wm_text_pos);
         $wm_text_x = $temp_wm_text["dest_x"];  m" o5 n4 x2 ~$ ^' u
         $wm_text_y = $temp_wm_text["dest_y"];
         if(preg_match("/([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])/i", $this->wm_text_color, $color))- i8 a2 j% u9 a0 b9 K# O/ J5 I
         {
            $red = hexdec($color[1]);
            $green = hexdec($color[2]);
            $blue = hexdec($color[3]);
            $wm_text_color = imagecolorallocate($src_image, $red,$green,$blue);: I7 D) s& j, W' K& W
         }else{, k8 @/ c6 z2 D9 U# T3 Y2 Z- R  i( L
            $wm_text_color = imagecolorallocate($src_image, 255,255,255);
         }4 z2 J7 e; S  K& s1 G
         $ v, g& h& i( |) D1 v
         imagettftext($src_image, $this->wm_text_size, $this->wm_angle, $wm_text_x, $wm_text_y, $wm_text_color,$this->wm_text_font,  $this->wm_text);+ x' x4 ~2 n% ^
      }" i5 R5 B' H% d  D0 a
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      if ($this->save_file) {! P( {. k7 J# Q( |, A
         switch ($this->output_type){* `& c( {. @3 d5 h
            case 'gif':$src_img=ImagePNG($src_image, $this->save_file); break;, u/ e, @7 M2 t( R
            case 'jpeg':$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
            case 'png':$src_img=ImagePNG($src_image, $this->save_file); break;
            default:$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
         }: [" k% U6 ]6 K0 A9 B$ S( a
      } else {
         if ($src_image_type = "jpg") $src_image_type="jpeg";. R* x  m( p& l& Y* ^1 }6 U2 S
            header("Content-type: image/{$src_image_type}");
            switch ($src_image_type){
                  case 'gif':$src_img=ImagePNG($src_image); break;
                  case 'jpg':$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;7 C: I1 G/ f4 n$ c" H2 `
                  case 'png':$src_img=ImagePNG($src_image);break;
                  default:$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;0 H7 I6 ?9 }' ]* a, P( k/ h
            }# ?- a9 m' G# S) F0 J) D, G% J$ Z
         }0 j. X9 C: Y$ G8 p$ D) {
      imagedestroy($src_image);
}
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/**
   * 根据文件名和类型创建图片
   * 5 \1 o1 K' x. d$ P* i
   * @access private% W% J$ {3 W4 l; T
   * @param string $type 图片的类型，包括gif,jpg,png
   * @param string $img_name 图片文件名，包括路径名，如"./mouse.jpg"5 F/ x% z. A1 m" R) C4 a! @/ J
   * @return mixed $tmp_img 返回一图像标识符
   */
function createImage($type,$img_name){
         if (!$type){
               $type = $this->get_type($img_name);0 [6 C4 B! X& {. L
         }

            switch ($type){
                  case 'gif':- }0 M3 R) D: u+ @& S
                        if (function_exists('imagecreatefromgif'))$ I) |7 n3 N' H2 }
                                 $tmp_img=@ImageCreateFromGIF($img_name);
                        break;2 r. ]4 x+ ~" `+ d' v
                  case 'jpg':
                        $tmp_img=ImageCreateFromJPEG($img_name);
                        break;
                  case 'png':
                        $tmp_img=ImageCreateFromPNG($img_name);
                        break;
                  default:: y' z. \  p; f7 O/ N6 ^$ U3 b% b+ _
                        $tmp_img=ImageCreateFromString($img_name);; Q, S/ A5 [+ n! I* I
                        break;
            }  ~/ H: c6 u6 B, `
            return $tmp_img;
}4 z$ y. n0 {, l) X" m4 P- c

/**  ~2 M. l& Q; h
   * 根据源图像的长、宽，位置代码，水印图片id来生成把水印放置到源图像中的位置) ^" l0 G7 ^  H( `
   *+ Q' C& Z8 g& w# s& z  Y
   * @access pravate7 L+ k6 @, N1 A
   * @param int $sourcefile_width 源图像的宽( |* \; H, H' z! j* n( |, ?
   * @param int $sourcefile_height 原图像的高9 A, G7 @& a5 u* M5 D2 s& u9 S
   * @param int $pos  位置代码" D8 V8 n- x: j' E. O' y
   *  0 = middle% E  I# A7 r$ d& |, s
   *  1 = top left- F7 l: A% G7 `1 g4 x
   *  2 = top right8 @  b& {/ n  I/ R5 A2 k2 K# d
   *  3 = bottom right
   *  4 = bottom left
   *  5 = top middle; {. C0 V) W1 \
   *  6 = middle right
   *  7 = bottom middle
   *  8 = middle left! W7 Q0 z; B) ~) [: [2 @
   * @param int $wm_image 水印图片ID
   * @return array 返回位置参数数组
   */
function getPos($sourcefile_width,$sourcefile_height,$pos,$wm_image=""){
      if  ($wm_image){
            $insertfile_width = ImageSx($wm_image);5 `. ~' Y1 N& l. y- s
            $insertfile_height = ImageSy($wm_image);- l& X; d. o7 f2 ~) K0 `; V
      }else {5 }- k* V  V7 z+ O+ ]* A% A
            $lineCount = explode(". N1 u% a' Z$ a
",$this->wm_text);: p2 K  K, P8 j$ m- Q) S, J. f: K
            $fontSize = imagettfbbox($this->wm_text_size,$this->wm_text_angle,$this->wm_text_font,$this->wm_text);
            $insertfile_width = $fontSize[2] - $fontSize[0];/ L/ N8 T0 J( ~1 D6 h/ ~( S0 q
            $insertfile_height = count($lineCount)*($fontSize[1] - $fontSize[3]);, G( @% r4 r) Z) M2 [! M
      }
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      switch ($pos){
         case 0:
            $dest_x = ( $sourcefile_width / 2 ) - ( $insertfile_width / 2 );
            $dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
            break;

         case 1:2 ]$ d9 J$ n6 K( W1 `
            $dest_x = 0;( X0 `  e- t" B0 D- A# x1 V/ _
            if ($this->wm_text){& l9 ~  q7 X' w' s+ J% V, c
               $dest_y = $insertfile_height;
            }else{
               $dest_y = 0;
            }
            break;/ }6 O: q( P8 N, i8 R! k1 `' o1 g

         case 2:
            $dest_x = $sourcefile_width - $insertfile_width;9 u- I( J  Q* M( y2 {) b& F7 Q
            if ($this->wm_text){
                  $dest_y = $insertfile_height;8 C: P- S0 W: P5 L- [6 \  k0 A
            }else{% h3 N) @) ?! K' O2 G
                  $dest_y = 0;
            }
            break;( ?. F. E& Y$ l( j, |
/ ^4 w8 e) O7 j
         case 3:
            $dest_x = $sourcefile_width - $insertfile_width;
            $dest_y = $sourcefile_height - $insertfile_height;9 n0 [$ @1 u' k6 f, @* ]. x
            break;( l# ?; ~; p5 r7 s/ `& h8 l
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         case 4:3 f  ?/ N& I$ f4 u" }9 T: Y
            $dest_x = 0;
            $dest_y = $sourcefile_height - $insertfile_height;  ?  L- ~- N  Y) X) u. x
            break;7 s/ {; t9 T% |& M
# \+ \9 a" ]) Y. M
         case 5:
            $dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );& o' {$ h* c6 V0 Z
            if ($this->wm_text){
                  $dest_y = $insertfile_height;) g8 F; l7 u) ]3 c5 c* Y% [3 A
            }else{; v4 P3 u6 i, t8 N2 s3 j
                  $dest_y = 0;
            }
            break;
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         case 6:  {2 t7 \9 D5 t4 Q4 g: |# i9 Z
            $dest_x = $sourcefile_width - $insertfile_width;8 p% l2 R8 \- Z1 L0 H6 u
            $dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );/ N+ [- w0 _) c. j" V
            break;

         case 7:0 d: R: B' N/ Z- d/ B
            $dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );& N6 C& C# F7 O1 z- v
            $dest_y = $sourcefile_height - $insertfile_height;2 {9 G7 a) |3 k( i& L) f! e' n- Q
            break;8 U$ C) u- w2 O2 D% i; Y

         case 8:, n9 h0 H* {# H8 U, v, s8 P8 P
            $dest_x = 0;, U7 f. Q5 V  V/ T3 c4 Y
            $dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );# n3 }& U/ U, b6 c
            break;/ x9 O* X$ h. d4 f% q+ f

         default:
            $dest_x = $sourcefile_width - $insertfile_width;0 ^# P6 y* f% V! E+ s
            $dest_y = $sourcefile_height - $insertfile_height;
            break;* ]" F5 e, q+ b6 R& \
      }
      return array("dest_x"=>$dest_x,"dest_y"=>$dest_y);( n7 J5 l# E3 o) C9 H# X" X
}

/**
   * 指定的文字转换为UTF-8格式，包括中英文混合
   *
   * @access private% c2 E9 R" V& Q
   * @param string $gb 输入gb类型的字数串
   * @return string $utf8
   */
function gb2utf8($gb)
{
      if(!trim($gb))1 Z" q0 k( S9 D4 `: k9 G
         return $gb;
      $filename="./gb2312.txt";
      $tmp=file($filename);
      $codetable=array();3 w2 L' J3 O. F+ x* h7 R( h
      while(list($key,$value)=each($tmp))
      $codetable[hexdec(substr($value,0,6))]=substr($value,7,6);$ S7 \( c# x! k  X' ^
      1 T2 @. L1 u+ L
      $utf8="";; K$ [9 r* J4 r" }$ D/ S2 }
      while($gb)- `$ F6 R4 u; ], I# Y' V
      {' f/ E# f: }' i' ^. A, k7 a% {
         if (ord(substr($gb,0,1))>127) {
            $tthis=substr($gb,0,2);/ b. v! o8 B, M* ]5 g: X+ @) }# M
            $gb=substr($gb,2,strlen($gb)-2);! ]5 W; x) `3 e! |. W, N6 U  w0 q
            $utf8.=$this->u2utf8(hexdec($codetable[hexdec(bin2hex($tthis))-0x8080]));
         } else {6 w/ t4 [: |+ T+ u7 N( q3 r
            $tthis=substr($gb,0,1);# a4 p3 O; S& B. n5 M3 n; D
            $gb=substr($gb,1,strlen($gb)-1);
            $utf8.=$this->u2utf8($tthis);
         }
      }' }8 g; B- v# v" S. K2 w0 [* `
      return $utf8;
}
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function u2utf8($c)
{
      $str="";$ a( ?0 F+ q% e; d  l
      if ($c < 0x80) {
         $str.=$c;  o4 X# ~( }0 r# j( I1 O" }
      } else if ($c < 0x800) {2 S7 {4 O, @& r1 c2 W
         $str.=chr(0xC0 | $c>>6);
         $str.=chr(0x80 | $c & 0x3F);$ D9 [: M' v, j+ B) N' m
      } else if ($c < 0x10000) {
         $str.=chr(0xE0 | $c>>12);
         $str.=chr(0x80 | $c>>6 & 0x3F);
         $str.=chr(0x80 | $c & 0x3F);1 f' Y5 d$ `& p! ~
      } else if ($c < 0x200000) {
         $str.=chr(0xF0 | $c>>18);# d' S( c( w; z% s: L; m
         $str.=chr(0x80 | $c>>12 & 0x3F);
         $str.=chr(0x80 | $c>>6 & 0x3F);' n5 Y: p% o1 y4 R; A: m2 v# W
         $str.=chr(0x80 | $c & 0x3F);# R% R- r. P$ v
      }
      return $str;
}
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/**# @! a# `; T8 D0 P
   * 获得图片的格式，包括jpg,png,gif
   *
   * @access private+ ~9 h# r' v% u$ y
   * @param string $img_name 图片文件名，可以包括路径名+ m/ e0 O  A) c" @6 {! w+ x- }
   * @return string $type4 N- y3 G8 h7 |: N
   */5 ^2 ^1 K5 o6 I5 g
function get_type($img_name)! n  q8 L- L% Q% N
{
      $name_array = explode(".",$img_name);
      if (preg_match("/.(jpg|jpeg|gif|png)$/", $img_name, $matches))' T! F+ C  N5 B/ S
         $type = strtolower($matches[1]);% q! s3 }/ o* `6 S
      else% {# u! H" g- ^
         $type = "string";/ f/ z/ l* C3 v* B# q- D

      return $type;3 L5 s: {: n4 {+ B0 v
}

}
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该类使用方法如下：

$img = new Gimage();
$img->wm_text = "www.discuz.com";
$img->wm_text_font = "./STXINWEI.TTF";- u$ i8 h' a8 L* l0 _  w) c
$img->create("./mouse.jpg");: u+ Y/ C1 I* _  r+ l
mouse.jpg 是你要在其上添加水印的图片名称，注意包含路径名
STXINWEI.TTF 是字体文件的路径名＋文件名) f1 @% a' D2 ^1 ?' R9 O( E
这就是一个简单的测试。如果要调整更复杂的显示效果，只要修改一下类中的属性就可以了，例如把字体放大就可以
$img->wm_text_size = 20;
增加水印图片就可以
$img->wm_image_name=”文件名”; 5 E* R4 f& R$ b) G) G, y; C- j4 P
" _0 V) m4 J4 q$ D
二、给图片增加水印的php文件，包含实际运行代码，支持图片和文字水印

<?php
/* ; i. W4 R6 a. @( S$ r! o* ]" K( @6 w
* 功能：PHP图片水印 (水印支持图片或文字)
* 参数： ' Z, t; K) C" x/ R& w7 E1 Q3 R
*    $groundImage 背景图片，即需要加水印的图片，暂只支持GIF,JPG,PNG格式；
*    $waterPos    水印位置，有10种状态，0为随机位置；
*                   1为顶端居左，2为顶端居中，3为顶端居右；
*                   4为中部居左，5为中部居中，6为中部居右； ' |6 C2 X6 v; R8 I
*                   7为底端居左，8为底端居中，9为底端居右；
*    $waterImage    图片水印，即作为水印的图片，暂只支持GIF,JPG,PNG格式；
*    $waterText    文字水印，即把文字作为为水印，支持ASCII码，不支持中文；
*    $textFont    文字大小，值为1、2、3、4或5，默认为5； & J2 ?' y! }* F
*    $textColor    文字颜色，值为十六进制颜色值，默认为#FF0000(红色)；
*
* 注意：Support GD 2.0，Support FreeType、GIF Read、GIF Create、JPG 、PNG
*    $waterImage 和 $waterText 最好不要同时使用，选其中之一即可，优先使用 $waterImage。
*    当$waterImage有效时，参数$waterString、$stringFont、$stringColor均不生效。
*    加水印后的图片的文件名和 $groundImage 一样。 6 W  ?* S6 ]" D
* 作者：longware @ 2004-11-3 14:15:13 ; ]6 }, q1 ?' u5 H: x. b8 ?
*/ 4 w4 Y+ q: P) W. n  H
function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="", $textFont=5,$textColor="#FF0000") * [- s! [' S) ^7 K, U5 X! h) I% A
{
$isWaterImage = FALSE;
$formatMsg = "暂不支持该文件格式，请用图片处理软件将图片转换为GIF、JPG、PNG格式。"; # K" ]; i) Q5 K

//读取水印文件
if(!empty($waterImage) && file_exists($waterImage)) { 1 S/ o" Y! i% v. C/ Z
      $isWaterImage = TRUE;
      $water_info = getimagesize($waterImage);
      $water_w = $water_info[0];//取得水印图片的宽
      $water_h = $water_info[1];//取得水印图片的高
  q& g: y0 C% Q; g( d
      switch($water_info[2])  { //取得水印图片的格式
         case 1:$water_im = imagecreatefromgif($waterImage);break;
         case 2:$water_im = imagecreatefromjpeg($waterImage);break;
         case 3:$water_im = imagecreatefrompng($waterImage);break; / J. Z/ d3 C, B' q
         default:die($formatMsg); * ~% W& }! R' u' m% N% N! {5 y
      } 9 J8 m9 v. W, m0 y" p
}
+ W# ]+ \( H! U5 K, e) g
//读取背景图片 ' Q2 W; J6 Z% B% G8 s
if(!empty($groundImage) && file_exists($groundImage)) { & i8 g9 B% U: s7 I4 U$ b* d% w
      $ground_info = getimagesize($groundImage); ) J4 ^2 |, X: E% T, ^) M% I
      $ground_w = $ground_info[0];//取得背景图片的宽
      $ground_h = $ground_info[1];//取得背景图片的高

      switch($ground_info[2]) { //取得背景图片的格式
         case 1:$ground_im = imagecreatefromgif($groundImage);break;
         case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
         case 3:$ground_im = imagecreatefrompng($groundImage);break;
         default:die($formatMsg); " T" j5 [& l4 ?
      } 1 W1 g) Y3 b: m4 A8 [) [
} else { - _* _9 u9 C" W
      die("需要加水印的图片不存在！");
}
3 @. w+ n* v$ Y% Z
//水印位置
if($isWaterImage) { //图片水印  1 z/ C3 g% x$ i  \7 |$ n( k7 H
      $w = $water_w; ( a8 v/ G; M* f, @2 k. w9 x
      $h = $water_h;
      $label = "图片的";
} else {  //文字水印 " _2 V7 N4 ?' p' s- @4 U
      $temp = imagettfbbox(ceil($textFont*2.5),0,"./cour.ttf",$waterText);//取得使用 TrueType 字体的文本的范围
      $w = $temp[2] - $temp[6]; 9 k" ~+ b; Q! b( z
      $h = $temp[3] - $temp[7];
      unset($temp); 0 R% d+ u8 T+ p! t
      $label = "文字区域";
} ; @1 X7 o# Z) u! j6 C% Q- P
if( ($ground_w<$w) || ($ground_h<$h) ) {
      echo "需要加水印的图片的长度或宽度比水印".$label."还小，无法生成水印！"; / ~+ k, D0 o: a% U- {3 k+ ~
      return;
} 8 y9 n: ]7 E3 d7 R; Z
switch($waterPos) {
      case 0://随机
         $posX = rand(0,($ground_w - $w));
         $posY = rand(0,($ground_h - $h));
         break; . H; B% x" d0 N# |0 K0 f
      case 1://1为顶端居左
         $posX = 0;
         $posY = 0; " d' j2 V' P/ U) ~
         break;
      case 2://2为顶端居中
         $posX = ($ground_w - $w) / 2; ( |/ Z/ @8 M/ A' w9 E
         $posY = 0; 1 ^& f+ n/ k( {: }5 t3 z" C! r2 E
         break;
      case 3://3为顶端居右
         $posX = $ground_w - $w;
         $posY = 0;
         break;
      case 4://4为中部居左   e5 r) r! c1 o4 I
         $posX = 0; 5 O9 b& O& L( n# x3 J
         $posY = ($ground_h - $h) / 2;
         break;
      case 5://5为中部居中 4 Y  \+ S, L; N7 w7 x7 @) e$ t$ q
         $posX = ($ground_w - $w) / 2;
         $posY = ($ground_h - $h) / 2;
         break;
      case 6://6为中部居右
         $posX = $ground_w - $w;
         $posY = ($ground_h - $h) / 2;
         break;
      case 7://7为底端居左
         $posX = 0;
         $posY = $ground_h - $h; , T, ~% q9 j% _0 B& l1 L
         break; 4 S7 A, E9 b4 z. i0 w
      case 8://8为底端居中
         $posX = ($ground_w - $w) / 2; % t# l! n6 u% \6 |3 `
         $posY = $ground_h - $h;
         break; 8 K& @* m: j1 J$ q/ E. q
      case 9://9为底端居右 3 X- h; t% R' h# f
         $posX = $ground_w - $w; $ U$ S" F' Z% y; ^/ T( d, e
         $posY = $ground_h - $h;
         break;
      default://随机
         $posX = rand(0,($ground_w - $w)); " W% m8 R% {5 X5 E* a
         $posY = rand(0,($ground_h - $h));
         break;
} ' y: u7 a5 s* l! y2 A, v6 L

//设定图像的混色模式
imagealphablending($ground_im, true); + A! X* A. U  K) x& A% s  \
  n2 _) v. k% @4 l
if($isWaterImage) { //图片水印
      imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷贝水印到目标文件
} else {//文字水印% v% W7 m! B; U
      if( !empty($textColor) && (strlen($textColor)==7) ) {
         $R = hexdec(substr($textColor,1,2));
         $G = hexdec(substr($textColor,3,2)); 6 ?: K+ i5 f# p( ?' J5 _- A2 g1 V( @! u; H
         $B = hexdec(substr($textColor,5)); 5 ?0 ~( y' x; m' _: W: o
      } else {
         die("水印文字颜色格式不正确！");
      }
      imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));       . H# `6 Y! N; E
} - C8 t3 N5 f2 Q8 v+ [

//生成水印后的图片 5 ?! H/ V1 H  o& k
@unlink($groundImage);
switch($ground_info[2]) {//取得背景图片的格式
      case 1:imagegif($ground_im,$groundImage);break;
      case 2:imagejpeg($ground_im,$groundImage);break; 4 F5 n$ b. j& x1 h& Y( M* H9 G
      case 3:imagepng($ground_im,$groundImage);break;
      default:die($errorMsg);
} % I; J# I9 _5 H
6 H8 t. p+ V7 [! J. O4 Y5 N
//释放内存 : \. O. H8 H4 X9 d* H3 f# G. N- h" r
if(isset($water_info)) unset($water_info);
if(isset($water_im)) imagedestroy($water_im);
unset($ground_info);
imagedestroy($ground_im);
} 4 |$ `- |7 I: s5 Z9 G9 e
/ X$ v) T, X% u
# P6 J3 x4 z" t

if(isset($_FILES) && !empty($_FILES['userfile']) && $_FILES['userfile']['size']>0) { ( Z) b  O+ o) i$ B: C
$uploadfile = "./".time()."_".$_FILES['userfile']['name']; + f6 e: _. m1 C; s1 P
if (copy($_FILES['userfile']['tmp_name'], $uploadfile)) {
      echo "OK<br>";
8 d2 N! M2 l% }  X
      //文字水印
      imageWaterMark($uploadfile,0,"","HTTP://BLOG.CSDN.NET/LONGWARE/",5,"#FF0000"); 6 C2 d) `9 M; a" Z' c
2 M: z0 V) i8 B6 L7 Y, _/ g$ c
      //图片水印 1 Y; B7 ]6 C) V
      //$waterImage="./Hanweb_shuiyin.gif";//水印图片路径
      //imageWaterMark($uploadfile,0,$waterImage); ; q) E* C; L  P2 V% m9 F( I
( ?  |  a& ?  F
      echo "<img src="".$uploadfile."" border="0">";
} else {
      echo "Fail<br>"; 8 S( A  c* ^' V
} 3 B! O% Z3 w7 L3 `: f/ Y4 T  h: O
}   t/ z7 f( f. R5 {: E
?> ( K' H% L! w$ \* c7 V% J+ s# M1 M
3 X2 Q7 f* j- ~+ ~& z
<form enctype="multipart/form-data" method="POST"> 1 u9 ~  R2 y9 g
文件: <input name="userfile" type="file"> , L3 _6 N# K6 M/ ^% g6 s/ U% \- Z
<input type="submit" value="上传"> / `( S- I1 ]7 q2 v( Z
</form>

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